Courier Express

#include <iostream>
#include <string>
#include <cmath>
#include <climits>
#include <iomanip>
#include <algorithm>
#include <exception>

using namespace std;

int main()
{
    double kilograms, kilometers;
    string product;
    cin >> kilograms >> product >> kilometers;

    double work_kilos = kilograms * 1000;

    double value_for_kilometers, nad;

    if (product == "standard")
    {
        if (work_kilos < 1000)
        {
            value_for_kilometers = kilometers * 0.03;
        }
        else if (work_kilos >= 1000 && work_kilos < 10000)
        {
            value_for_kilometers = kilometers * 0.05;
        }
        else if (work_kilos >= 11000 && work_kilos < 40000)
        {
            value_for_kilometers = kilometers * 0.1;
        }
        else if (work_kilos >= 41000 && work_kilos < 90000)
        {
            value_for_kilometers = kilometers * 0.15;
        }
        else if (work_kilos >= 91000 && work_kilos < 150000)
        {
            value_for_kilometers = kilometers * 0.2;
        }
        cout << "The delivery of your shipment with weight of " << fixed << setprecision(3) << kilograms << " kg. would cost " <<
            fixed << setprecision(2) << value_for_kilometers << " lv." << endl;
    }
    if (product == "express")
    {
        if (work_kilos < 1000)
        {
            value_for_kilometers = kilometers * 0.03;
            nad = (((0.8 * 0.03) * kilograms) * kilometers) + value_for_kilometers;
        }
        else if (work_kilos >= 1000 && work_kilos < 10000)
        {
            value_for_kilometers = kilometers * 0.05;
            nad = (((0.4 * 0.05) * kilograms) * kilometers) + value_for_kilometers;
        }
        else if (work_kilos >= 11000 && work_kilos < 40000)
        {
            value_for_kilometers = kilometers * 0.1;
            nad = (((0.05 * 0.1) * kilograms) * kilometers) + value_for_kilometers;
        }
        else if (work_kilos >= 41000 && work_kilos < 90000)
        {
            value_for_kilometers = kilometers * 0.15;
            nad = (((0.02 * 0.15) * kilograms) * kilometers) + value_for_kilometers;
        }
        else if (work_kilos >= 91000 && work_kilos < 150000)
        {
            value_for_kilometers = kilometers * 0.2;
            nad = (((0.01 * 0.2) * kilograms) * kilometers) + value_for_kilometers;
        }
        cout << "The delivery of your shipment with weight of " << fixed << setprecision(3) << kilograms << " kg. would cost " <<
            fixed << setprecision(2) << nad << " lv." << endl;
    }

    return 0;
}